/data/refman/pasoursint/CMSSW_6_1_2_SLHC2/src/MagneticField/GeomBuilder/src/MagGeoBuilderFromDDD.cc

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/*
 *  See header file for a description of this class.
 *
 *  $Date: 2011/10/13 16:31:37 $
 *  $Revision: 1.31 $
 *  \author N. Amapane - INFN Torino
 */

#include "MagneticField/GeomBuilder/src/MagGeoBuilderFromDDD.h"
#include "MagneticField/GeomBuilder/src/volumeHandle.h"
#include "MagneticField/GeomBuilder/src/bSlab.h"
#include "MagneticField/GeomBuilder/src/bRod.h"
#include "MagneticField/GeomBuilder/src/bSector.h"
#include "MagneticField/GeomBuilder/src/bLayer.h"
#include "MagneticField/GeomBuilder/src/eSector.h"
#include "MagneticField/GeomBuilder/src/eLayer.h"
#include "MagneticField/GeomBuilder/src/FakeInterpolator.h"

#include "MagneticField/Layers/interface/MagBLayer.h"
#include "MagneticField/Layers/interface/MagESector.h"

#include "FWCore/ParameterSet/interface/FileInPath.h"

#include "DetectorDescription/Core/interface/DDCompactView.h"
#include "DetectorDescription/Core/interface/DDFilteredView.h"
#include "DetectorDescription/Core/interface/DDFilter.h"

#include "Utilities/BinningTools/interface/ClusterizingHistogram.h"
#include "CLHEP/Units/GlobalSystemOfUnits.h"

#include "MagneticField/Interpolation/interface/MagProviderInterpol.h"
#include "MagneticField/Interpolation/interface/MFGridFactory.h"
#include "MagneticField/Interpolation/interface/MFGrid.h"

#include "MagneticField/VolumeGeometry/interface/MagVolume6Faces.h"
#include "MagneticField/VolumeGeometry/interface/MagExceptions.h"
#include "MagneticField/Layers/interface/MagVerbosity.h"

#include "DataFormats/GeometryVector/interface/Pi.h"

#include "FWCore/Utilities/interface/Exception.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include <string>
#include <vector>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <iterator>
#include <map>
#include <set>
#include <iomanip>
#include "Utilities/General/interface/precomputed_value_sort.h"


bool MagGeoBuilderFromDDD::debug;

using namespace std;

MagGeoBuilderFromDDD::MagGeoBuilderFromDDD(string tableSet_, bool debug_, bool overrideMasterSector_) :
  tableSet (tableSet_),
  geometryVersion(0),
  overrideMasterSector(overrideMasterSector_)
{  
  debug = debug_;
  if (debug) cout << "Constructing a MagGeoBuilderFromDDD" <<endl;
}

MagGeoBuilderFromDDD::~MagGeoBuilderFromDDD(){
  for (handles::const_iterator i=bVolumes.begin();
       i!=bVolumes.end(); ++i){
    delete (*i);
  }
  
  for (handles::const_iterator i=eVolumes.begin();
       i!=eVolumes.end(); ++i){
    delete (*i);
  }
}


void MagGeoBuilderFromDDD::summary(handles & volumes){  
  // The final countdown.
  int ivolumes  = volumes.size();  // number of volumes
  int isurfaces = ivolumes*6;       // number of individual surfaces
  int iassigned = 0;                // How many have been assigned
  int iunique   = 0;                // number of unique surfaces
  int iref_ass  = 0;
  int iref_nass = 0;

  set<const void *> ptrs;

  handles::const_iterator first = volumes.begin();
  handles::const_iterator last = volumes.end();

  for (handles::const_iterator i=first; i!=last; ++i){
    if (int((*i)->shape())>4) continue; // FIXME: implement test for missing shapes...
    for (int side = 0; side < 6; ++side) {
      int references =  (*i)->references(side);
      if ((*i)->isPlaneMatched(side)) {
        ++iassigned;
        bool firstOcc = (ptrs.insert(&((*i)->surface(side)))).second;
        if (firstOcc) iref_ass+=references;
        if (references<2){  
          cout << "*** Only 1 ref, vol: " << (*i)->name << " # "
               << (*i)->copyno << " side: " << side << endl;
        }       
      } else {
        iref_nass+=references;
        if (references>1){
          cout << "*** Ref_nass >1 " <<endl;
        }
      }
    }
  }
  iunique = ptrs.size();

  cout << "    volumes   " << ivolumes  << endl
       << "    surfaces  " << isurfaces << endl
       << "    assigned  " << iassigned << endl
       << "    unique    " << iunique << endl
       << "    iref_ass  " << iref_ass << endl
       << "    iref_nass " << iref_nass << endl;
}


void MagGeoBuilderFromDDD::build(const DDCompactView & cpva)
{
//    DDCompactView cpv;
  DDExpandedView fv(cpva);

  if (debug) cout << "**********************************************************" <<endl;

  // The actual field interpolators
  map<string, MagProviderInterpol*> bInterpolators;
  map<string, MagProviderInterpol*> eInterpolators;
  
  // Counter of different volumes
  int bVolCount = 0;
  int eVolCount = 0;

  if (fv.logicalPart().name().name()!="MAGF") {
     std::string topNodeName(fv.logicalPart().name().name());

     //see if one of the children is MAGF
     bool doSubDets = fv.firstChild();
     
     bool go=true;
     while(go&& doSubDets) {
        if (fv.logicalPart().name().name()=="MAGF")
           break;
        else
           go = fv.nextSibling();
     }
     if (!go) {
        throw cms::Exception("NoMAGFinDDD")<<" Neither the top node, nor any child node of the DDCompactView is \"MAGF\" but the top node is instead \""<<topNodeName<<"\"";
     }
  }
  // Loop over MAGF volumes and create volumeHandles. 
  if (debug) { cout << endl << "*** MAGF: " << fv.geoHistory() << endl
                    << "translation: " << fv.translation() << endl
                    << " rotation: " << fv.rotation() << endl;
  }
  
  bool doSubDets = fv.firstChild();
  while (doSubDets){
    
    string name = fv.logicalPart().name().name();
    if (debug) cout << endl << "Name: " << name << endl
                               << "      " << fv.geoHistory() <<endl;
    
    // FIXME: single-volyme cylinders - this is feature has been removed 
    //        and should be revisited.
    //    bool mergeCylinders=false;

    // If true, In the barrel, cylinders sectors will be skipped to build full 
    // cylinders out of sector copyno #1.
    bool expand = false;

//     if (mergeCylinders) {
//       if (name == "V_ZN_1"
//        || name == "V_ZN_2") {
//      if (debug && fv.logicalPart().solid().shape()!=ddtubs) {
//        cout << "ERROR: MagGeoBuilderFromDDD::build: volume " << name
//             << " should be a cylinder" << endl;
//      }
//      if(fv.copyno()==1) {
//        expand = true;
//      } else {
//        //cout << "... to be skipped: "
//        //     << name << " " << fv.copyno() << endl;
//      }
//       }
//     }

    volumeHandle* v = new volumeHandle(fv, expand);
    //FIXME: overrideMasterSector is a hack to allow switching between 
    // phi-symmetric maps and maps with sector-specific tables. 
    // It won't be necessary anymore once the geometry is decoupled from 
    // the specification of tables, ie when tables will come from the DB.
    if (overrideMasterSector && v->masterSector!=1) {
      v->masterSector=1;
      std::string::size_type ibeg, iend;
      ibeg = (v->magFile).rfind('/');
      iend = (v->magFile).size();
      v->magFile = (v->magFile).substr(ibeg+1,iend-ibeg-1);
    }

    // Select volumes, build volume handles.
    float Z = v->center().z();
    float R = v->center().perp();

    // v 85l: Barrel is everything up to |Z| = 661.0, excluding 
    // volume #7, centered at 6477.5
    // v 1103l: same numbers work fine. #16 instead of #7, same coords;
    // see comment below for V6,7
    //ASSUMPTION: no misalignment is applied to mag volumes.
    //FIXME: implement barrel/endcap flags as DDD SpecPars.
    if ((fabs(Z)<647. || (R>350. && fabs(Z)<662.)) &&
        !(fabs(Z)>480 && R<172) // in 1103l we place V_6 and V_7 in the 
                                // endcaps to preserve nice layer structure
                                // in the barrel. This does not hurt in v85l
                                // where there is a single V1 
        ) { // Barrel
      if (debug) cout << " (Barrel)" <<endl;
      bVolumes.push_back(v);


      // Build the interpolator of the "master" volume (the one which is
      // not replicated in phi)
      // ASSUMPTION: copyno == sector. 
      //             Note this is not the case for obsolete grid_85l_030919 - 
      // In case in  future models this should no more be the case, can 
      // implement secotor numbers as SpecPars in the XML      
      if (v->copyno==v->masterSector) {
        buildInterpolator(v, bInterpolators);
        ++bVolCount;
      }
    } else {               // Endcaps
      if (debug) cout << " (Endcaps)" <<endl;
      eVolumes.push_back(v);
      if (v->copyno==v->masterSector) { 
        buildInterpolator(v, eInterpolators);
        ++eVolCount;
      }
    }

    doSubDets = fv.nextSibling(); // end of loop over MAGF
  }
    
  if (debug) {
    cout << "Number of volumes (barrel): " << bVolumes.size() <<endl
                  << "Number of volumes (endcap): " << eVolumes.size() <<endl;
    cout << "**********************************************************" <<endl;
  }

  // Now all volumeHandles are there, and parameters for each of the planes
  // are calculated.

  //----------------------------------------------------------------------
  // Print summary information

  if (debug) {
    cout << "-----------------------" << endl;
    cout << "SUMMARY: Barrel " << endl;
    summary(bVolumes);
    
    cout << endl << "SUMMARY: Endcaps " << endl;
    summary(eVolumes);
    cout << "-----------------------" << endl;
  }


  //----------------------------------------------------------------------
  // Find barrel layers.

  vector<bLayer> layers; // the barrel layers
  precomputed_value_sort(bVolumes.begin(), bVolumes.end(), ExtractRN());

  // Find the layers (in R)
  const float resolution = 1.; // cm
  float rmin = bVolumes.front()->RN()-resolution;
  float rmax = bVolumes.back()->RN()+resolution;
  ClusterizingHistogram  hisR( int((rmax-rmin)/resolution) + 1, rmin, rmax);

  if (debug) cout << " R layers: " << rmin << " " << rmax << endl;

  handles::const_iterator first = bVolumes.begin();
  handles::const_iterator last = bVolumes.end();  

  for (handles::const_iterator i=first; i!=last; ++i){
    hisR.fill((*i)->RN());
  }
  vector<float> rClust = hisR.clusterize(resolution);

  handles::const_iterator ringStart = first;
  handles::const_iterator separ = first;

  for (unsigned int i=0; i<rClust.size() - 1; ++i) {
    if (debug) cout << " Layer at RN = " << rClust[i];
    float rSepar = (rClust[i] + rClust[i+1])/2.f;
    while ((*separ)->RN() < rSepar) ++separ;

    bLayer thislayer(ringStart, separ);
    layers.push_back(thislayer);
    ringStart = separ;
  }
  {
    if (debug) cout << " Layer at RN = " << rClust.back();
    bLayer thislayer(separ, last);
    layers.push_back(thislayer);
  }

  if (debug) cout << "Barrel: Found " << rClust.size() << " clusters in R, "
                  << layers.size() << " layers " << endl << endl;


  //----------------------------------------------------------------------
  // Find endcap sectors
  vector<eSector> sectors; // the endcap sectors

  // Find the number of sectors (should be 12 or 24 depending on the geometry model)
  float phireso = 0.05; // rad
  ClusterizingHistogram hisPhi( int((Geom::ftwoPi())/phireso) + 1,
                                -Geom::fpi(), Geom::fpi());
  
  for (handles::const_iterator i=eVolumes.begin(); i!=eVolumes.end(); ++i){
    hisPhi.fill((*i)->minPhi());
  }
  vector<float> phiClust = hisPhi.clusterize(phireso);
  int nESectors = phiClust.size();
  if (debug && (nESectors%12)!=0) cout << "ERROR: unexpected # of sectors: " << nESectors << endl;

  //Sort in phi
  precomputed_value_sort(eVolumes.begin(), eVolumes.end(), ExtractPhi());

  //Group volumes in sectors
  for (int i = 0; i<nESectors; ++i) {
    int offset = eVolumes.size()/nESectors;
    if (debug) cout << " Sector at phi = "
                    << (*(eVolumes.begin()+((i)*offset)))->center().phi()
                    << endl;
    sectors.push_back(eSector(eVolumes.begin()+((i)*offset),
                              eVolumes.begin()+((i+1)*offset)));
  }
   
  if (debug) cout << "Endcap: Found " 
                  << sectors.size() << " sectors " << endl;


  //----------------------------------------------------------------------  
  // Match surfaces.

//  cout << "------------------" << endl << "Now associating planes..." << endl;

//   // Loop on layers
//   for (vector<bLayer>::const_iterator ilay = layers.begin();
//        ilay!= layers.end(); ++ilay) {
//     cout << "On Layer: " << ilay-layers.begin() << " RN: " << (*ilay).RN()
//       <<endl;     

//     // Loop on wheels
//     for (vector<bWheel>::const_iterator iwheel = (*ilay).wheels.begin();
//       iwheel != (*ilay).wheels.end(); ++iwheel) {
//       cout << "  On Wheel: " << iwheel- (*ilay).wheels.begin()<< " Z: "
//         << (*iwheel).minZ() << " " << (*iwheel).maxZ() << " " 
//         << ((*iwheel).minZ()+(*iwheel).maxZ())/2. <<endl;

//       // Loop on sectors.
//       for (int isector = 0; isector<12; ++isector) {
//      // FIXME: create new constructor...
//      bSectorNavigator navy(layers,
//                            ilay-layers.begin(),
//                            iwheel-(*ilay).wheels.begin(),isector);
        
//      const bSector & isect = (*iwheel).sector(isector);
        
//      isect.matchPlanes(navy); //FIXME refcount
//       }
//     }
//   }


  //----------------------------------------------------------------------
  // Build MagVolumes and the MagGeometry hierarchy.

  //--- Barrel

  // Build MagVolumes and associate interpolators to them
  buildMagVolumes(bVolumes, bInterpolators);

  // Build MagBLayers
  for (vector<bLayer>::const_iterator ilay = layers.begin();
       ilay!= layers.end(); ++ilay) {
    mBLayers.push_back((*ilay).buildMagBLayer());
  }

  if (debug) {  
    cout << "*** BARREL ********************************************" << endl
         << "Number of different volumes   = " << bVolCount << endl
         << "Number of interpolators built = " << bInterpolators.size() << endl
         << "Number of MagBLayers built    = " << mBLayers.size() << endl;

    testInside(bVolumes); // FIXME: all volumes should be checked in one go.
  }
  
  //--- Endcap
  // Build MagVolumes  and associate interpolators to them
  buildMagVolumes(eVolumes, eInterpolators);

  // Build the MagESectors
  for (vector<eSector>::const_iterator isec = sectors.begin();
       isec!= sectors.end(); ++isec) {
    mESectors.push_back((*isec).buildMagESector());
  }

  if (debug) {
    cout << "*** ENDCAP ********************************************" << endl
         << "Number of different volumes   = " << eVolCount << endl
         << "Number of interpolators built = " << eInterpolators.size() << endl
         << "Number of MagESector built    = " << mESectors.size() << endl;

    testInside(eVolumes); // FIXME: all volumes should be checked in one go.
  }
}


void MagGeoBuilderFromDDD::buildMagVolumes(const handles & volumes, map<string, MagProviderInterpol*> & interpolators) {
  // Build all MagVolumes setting the MagProviderInterpol
  for (handles::const_iterator vol=volumes.begin(); vol!=volumes.end();
       ++vol){
    const MagProviderInterpol* mp = 0;
    if (interpolators.find((*vol)->magFile)!=interpolators.end()) {
      mp = interpolators[(*vol)->magFile];
    } else {
      cout << "No interpolator found for file " << (*vol)->magFile
           << " vol: " << (*vol)->name << endl;
      cout << interpolators.size() <<endl;
    }
      

    // Get the volume number from the volume name.
    // ASSUMPTION: volume names ends with "_NUM" where NUM is the volume number
    int volNum;
    string name = (*vol)->name;
    name.erase(0,name.rfind('_')+1);
    stringstream str;    
    str << name;
    str >> volNum;


    // ASSUMPTION: copyno == sector. 
    //             Note this is not the case for obsolete grid_85l_030919 - 
    // In case in  future models this should no more be the case, can 
    // implement secotor numbers as SpecPars in the XML
    int key = volNum*100+(*vol)->copyno; 
    map<int, double>::const_iterator isf = theScalingFactors.find(key);
    if (isf == theScalingFactors.end()) {
      key = volNum*100;
      isf = theScalingFactors.find(key);
    }
    
    double sf = 1.;
    if (isf != theScalingFactors.end()) {
      sf = (*isf).second;

      edm::LogInfo("MagneticField|VolumeBasedMagneticFieldESProducer") << "Applying scaling factor " << sf << " to "<< (*vol)->name << "["<< (*vol)->copyno << "] (key:" << key << ")" << endl;
    }

    const GloballyPositioned<float> * gpos = (*vol)->placement();
    (*vol)->magVolume = new MagVolume6Faces(gpos->position(),
                                            gpos->rotation(),
                                            (*vol)->shape(),
                                            (*vol)->sides(),
                                            mp, sf);

    if ((*vol)->copyno==(*vol)->masterSector) {
      (*vol)->magVolume->ownsFieldProvider(true);
    }

    (*vol)->magVolume->setIsIron((*vol)->isIron());

    // The name and sector of the volume are saved for debug purposes only. They may be removed at some point...
    (*vol)->magVolume->name = (*vol)->name;
    (*vol)->magVolume->copyno = (*vol)->copyno;
  }
}


void MagGeoBuilderFromDDD::buildInterpolator(const volumeHandle * vol, map<string, MagProviderInterpol*> & interpolators){

  // Phi of the master sector
  double masterSectorPhi = (vol->masterSector-1)*Geom::pi()/6.;

  if (debug) {
    cout << "Building interpolator from "
         << vol->name << " copyno " << vol->copyno
         << " at " << vol->center()
         << " phi: " << vol->center().phi()
         << " file: " << vol->magFile
         << endl;

    if ( fabs(vol->center().phi() - masterSectorPhi) > Geom::pi()/9.) {
      cout << "***WARNING wrong sector? " << endl;
    }
  }

  if (tableSet == "fake") {
    interpolators[vol->magFile] = new magneticfield::FakeInterpolator();
    return;
  }

  string fullPath;

  try {
    edm::FileInPath mydata("MagneticField/Interpolation/data/"+tableSet+"/"+vol->magFile);
    fullPath = mydata.fullPath();
  } catch (edm::Exception& exc) {
    cerr << "MagGeoBuilderFromDDD: exception in reading table; " << exc.what() << endl;
    if (!debug) throw;
    return;
  }
  
  
  try{
    if (vol->toExpand()){
      //FIXME: see discussion on mergeCylinders above.
//       interpolators[vol->magFile] =
//      MFGridFactory::build( fullPath, *(vol->placement()), vol->minPhi(), vol->maxPhi());
    } else {
      // If the table is in "local" coordinates, must create a reference 
      // frame that is appropriately rotated along the CMS Z axis.

      GloballyPositioned<float> rf = *(vol->placement());

      if (vol->masterSector != 1) {
        typedef Basic3DVector<float> Vector;

        GloballyPositioned<float>::RotationType rot(Vector(0,0,1), -masterSectorPhi);
        Vector vpos(vol->placement()->position());
        

        rf = GloballyPositioned<float>(GloballyPositioned<float>::PositionType(rot.multiplyInverse(vpos)), vol->placement()->rotation()*rot);
      }

      interpolators[vol->magFile] =
        MFGridFactory::build( fullPath, rf);
    }
  } catch (MagException& exc) {
    cout << exc.what() << endl;
    interpolators.erase(vol->magFile);
    if (!debug) throw; 
    return;
  }


    if (debug) {
    // Check that all grid points of the interpolator are inside the volume.
      const MagVolume6Faces tempVolume(vol->placement()->position(),
                                 vol->placement()->rotation(),
                                 vol->shape(),
                                 vol->sides(), 
                                 interpolators[vol->magFile]);

      const MFGrid* grid = dynamic_cast<const MFGrid*>(interpolators[vol->magFile]);
      if (grid!=0) {
        
        Dimensions sizes = grid->dimensions();
        cout << "Grid has 3 dimensions " 
             << " number of nodes is " << sizes.w << " " << sizes.h
             << " " << sizes.d << endl;
      
        const double tolerance = 0.03;


        size_t dumpCount = 0;
        for (int j=0; j < sizes.h; j++) {
          for (int k=0; k < sizes.d; k++) {
            for (int i=0; i < sizes.w; i++) {
              MFGrid::LocalPoint lp = grid->nodePosition( i, j, k);
              if (! tempVolume.inside(lp, tolerance)) {
                if (++dumpCount < 2) {
                  MFGrid::GlobalPoint gp = tempVolume.toGlobal(lp);
                  cout << "GRID ERROR: " << i << " " << j << " " << k
                       << " local: " << lp
                       << " global: " << gp
                       << " R= " << gp.perp() << " phi=" << gp.phi() << endl;
                }
              }
            }
          }
        }
    
        cout << vol->name << " : Number of grid points outside the MagVolume: " << dumpCount << "/" << sizes.w*sizes.h*sizes.d << endl;
      }
    }
}



void MagGeoBuilderFromDDD::testInside(handles & volumes) {
  // test inside() for all volumes.
  cout << "--------------------------------------------------" << endl;
  cout << " inside(center) test" << endl;
  for (handles::const_iterator vol=volumes.begin(); vol!=volumes.end();
       ++vol){
    for (handles::const_iterator i=volumes.begin(); i!=volumes.end();
         ++i){
      if ((*i)==(*vol)) continue;
      //if ((*i)->magVolume == 0) continue;
      if ((*i)->magVolume->inside((*vol)->center())) {
        cout << "*** ERROR: center of " << (*vol)->name << " is inside " 
             << (*i)->name <<endl;
      }
    }
    
    if ((*vol)->magVolume->inside((*vol)->center())) {
      cout << (*vol)->name << " OK " << endl;
    } else {
      cout << "*** ERROR: center of volume is not inside it, "
           << (*vol)->name << endl;
    }
  }
  cout << "--------------------------------------------------" << endl;
}


vector<MagBLayer*> MagGeoBuilderFromDDD::barrelLayers() const{
  return mBLayers;
}

vector<MagESector*> MagGeoBuilderFromDDD::endcapSectors() const{
  return mESectors;
}

vector<MagVolume6Faces*> MagGeoBuilderFromDDD::barrelVolumes() const{
  vector<MagVolume6Faces*> v;
  v.reserve(bVolumes.size());
  for (handles::const_iterator i=bVolumes.begin();
       i!=bVolumes.end(); ++i){
    v.push_back((*i)->magVolume);
  }
  return v;
}

vector<MagVolume6Faces*> MagGeoBuilderFromDDD::endcapVolumes() const{
  vector<MagVolume6Faces*> v;
  v.reserve(eVolumes.size());
  for (handles::const_iterator i=eVolumes.begin();
       i!=eVolumes.end(); ++i){
    v.push_back((*i)->magVolume);
  }
  return v;
}


float MagGeoBuilderFromDDD::maxR() const{
  //FIXME: should get it from the actual geometry - MAGF is an option, 
  //       but that is not changed together the geometry itself 
  //       (it lives in cmsMagneticField.xml in CMSCommonData)
  return 900.;
}

float MagGeoBuilderFromDDD::maxZ() const{
  //FIXME: should get it from the actual geometry - see above
  return 1600.;
}


void MagGeoBuilderFromDDD::setScaling(std::vector<int> keys, 
                                      std::vector<double> values)
{
  if (keys.size() != values.size()) {
    throw cms::Exception("InvalidParameter") << "Invalid field scaling parameters 'scalingVolumes' and 'scalingFactors' ";
  }
  for (unsigned int i=0; i<keys.size(); ++i) {
    theScalingFactors[keys[i]] = values[i];
  }
}